# ages.py
import random

# Каждый возраст: chance (%), explanation, модификатор способностей (dict с дельтами)
AGES = {
    "Youth": {
        "chance": 15.0,
        "explanation": "equivalent to human 13 – 17",
        "modifiers": {"Strength": -2, "Intelligence": -2, "Wisdom": -2},
    },
    "Adult": {
        "chance": 50.0,
        "explanation": "equivalent to human 18 – 35",
        "modifiers": {},
    },
    "MiddleAged": {
        "chance": 20.0,
        "explanation": "equivalent to human 36 – 55",
        "modifiers": {"Strength": -2, "Dexterity": -2, "Constitution": -2},
    },
    "Old": {
        "chance": 10.0,
        "explanation": "equivalent to human 56 – 75",
        "modifiers": {"Strength": -4, "Dexterity": -4, "Constitution": -4, "Charisma": -2},
    },
    "Ancient": {
        "chance": 5.0,
        "explanation": "equivalent to human 76 – 95",
        "modifiers": {"Strength": -6, "Dexterity": -6, "Constitution": -6, "Charisma": -4},
    },
}


def get_age_and_modify_abilities(
    ability_scores: dict[str, int],
) -> tuple[str, str, dict[str, int]]:
    """Выбирает возрастную категорию и применяет модификаторы к копии ability_scores."""
    total = sum(v["chance"] for v in AGES.values())
    r = random.random() * total
    cumulative = 0.0
    selected_key = None
    for key, data in AGES.items():
        cumulative += data["chance"]
        if r <= cumulative:
            selected_key = key
            break
    if selected_key is None:
        selected_key = list(AGES.keys())[-1]

    data = AGES[selected_key]
    aged_scores = dict(ability_scores)
    for stat, delta in data["modifiers"].items():
        aged_scores[stat] = aged_scores.get(stat, 0) + delta

    return selected_key, data["explanation"], aged_scores